diff --git a/minidlna/config.json b/minidlna/config.json
index 5a4f031..7f2634b 100644
--- a/minidlna/config.json
+++ b/minidlna/config.json
@@ -1,6 +1,6 @@
 {
   "name": "MiniDLNA",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "slug": "minidlna",
   "description": "RedyMedia MiniDLNA daemon serves media files (music, pictures, and video) to clients on a network",
   "url": "https://github.com/bvlaicu/home-assistant-addons/tree/master/minidlna",
@@ -28,7 +28,7 @@
     "log_level": "list(trace|debug|info|notice|warning|error|fatal)",
     "envvars": [
       {
-        "name": "match(^MINIDLNA_([A-Z0-9_])+$)",
+        "name": "match(^MINIDLNA_([a-zA-Z0-9_])+$)",
         "value": "str"
       }
     ]